1) Angle measuring instrument
Found on
https://www.crosswordclues.com/clue/graphometer
The graphometer or semicircle is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 degrees and sometimes subdivided into minutes. The limb is subtended by the diameter with two sights at its ends. In the middle of the diameter a `box and needle` (a compass) is fixed. On the same middle the al.....
Found on
http://en.wikipedia.org/wiki/Graphometer
graphometer A mathematical instrument, used for measuring angles in surveying; otherwise called a semi-circle. Also, a goniometer used in crystallography.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1302/16
No exact match found.
